Table 2.

Pearson correlation coefficient between study variables in diseased birds at d 7 postvirus inoculation¹

Item	IFN-γ	Hp	TNF-α	SAA	LBSA	TSA
Hp	0.949*
TNF-α	0.400	0.311
SAA	0.800	0.632	0.300
LBSA	0.800	0.949*	0.200	0.400
TSA	0.810	0.948*	0.200	0.400	1.000*
PBSA	0.400	0.316	0.400	0.800	0.200	0.200

¹Hp: haptoglobin; TNF-α: tumor necrosis factor-α; SAA: serum amyloid A; LBSA: lipid-bound sialic acid; TSA: total sialic acid; PBSA: protein-bound sialic acid.

^*Significant correlation (P < 0.05).